Remotely shut down your computer
If you know the name of the remote computer on your network and a simple command you can easily shutdown your computer from the command line, check here the blog post from inspectmygadget.com that demonstrate too how you can create remote shutdown shortcuts, other built-in Windows tools, and third-party utilities which can work on simple command to shutdown.
No doubt these methods require you to be on the same network and technical expertise to shut down windows with a text message, Check out here for more details.
